<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<!--
multiple 属性
规定输入域中可以选择多个值
适用于 input标签 email或file
-->

<form action="" method="post">
    <input type="file" multiple>
    <input type="email" name="email" multiple>
    <input type="email" name="test">
    <input type="submit" value="提交">
</form>
</body>
</html>